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Rectangular lithium-ion battery pack, dark finish, 69 by 38 by 21 mm

Cameron Sino Stockwell II C406A3 2600mAh 19.24Wh Dry Cell Battery

SKU CH-STQD-4X0N9

Replacement lithium-ion battery for the Stockwell II speaker, 2600 mAh at 7.4 V with a fully decoded chip and built-in protection circuits

  • Battery pack size69 × 38 × 21 mm
  • Battery capacity2,600 mAh
  • Details69 × 38 × 21 mm
  • Replacement battery for Marshall Stockwell II speaker
  • 2600mAh capacity delivers 19.24Wh of power
  • 4V lithium-ion cell matches original voltage
  • Compact 69.00 x 38.00 x 21.00mm form factor
  • Built-in protection against overcharge and short circuit

Replacement for Marshall Stockwell II

The Cameron Sino C406A3 is a lithium-ion dry cell battery built to match the original specifications for the Marshall Stockwell II portable speaker. It delivers a capacity of 2600mAh and 19.24Wh at 7.4V, using a fully decoded chip that communicates with the device exactly like the factory pack. The physical dimensions are 69.00 x 38.00 x 21.00mm and the weight is 98.0g.

Sustained power delivery

The cell composition is rated for stable output across the discharge cycle rather than a brief peak, supported by overcharge, over-discharge, over-voltage and short-circuit protection circuits. A new unit reaches its best runtime after two or three complete charge and discharge cycles, and the protection logic helps maintain consistent voltage under continuous playback loads.

Straightforward swap with common pitfalls

Installation is a direct connector swap inside the speaker cabinet; many users follow online video guides to open the enclosure and reconnect the plug. The most frequent issues are seating the connector incompletely, using a low-quality charger that degrades cycle life, or skipping the initial conditioning cycles. The pack includes shock-absorbing foam for transit protection.

How it compares

Measured against everything we stock in Alkaline & Coin Cell Batteries, at today’s prices. Recalculated every night.

Price $14.99
Cheaper than about 60% of the 190 comparable items (median $18.49).

Specifications

Product
Brand nameCameron Sino
Model nameStockwell II
Part numberC406A3, C406A3-1
Power
Battery capacity2,600 mAh
In the box
Battery pack size69 × 38 × 21 mm

Questions about this item

How much heat does the 7.4 V 2600 mAh cell generate during all-day playback?

The lithium-ion pack is rated at 7.4 V and 19.24 Wh; normal operation stays well below the 60 °C storage limit, so heat remains low during continuous use.

What must I already own to install this C406A3 replacement?

You need a Marshall Stockwell II speaker and a small screwdriver to open the battery compartment; the pack includes a pre-fitted connector that matches the original.

Will the 69 × 38 × 21 mm pack fit the original Stockwell II chassis without modification?

Yes, the dimensions match the factory battery exactly, and the decoded chip communicates with the speaker's original charging circuit.

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